Stock material or miscellaneous articles – All metal or with adjacent metals – Macroscopically anomalous interface between layers
Patent
1988-03-28
1989-10-10
Rutledge, L. Dewayne
Stock material or miscellaneous articles
All metal or with adjacent metals
Macroscopically anomalous interface between layers
428594, 428614, B32B 700
Patent
active
048731498
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a vibration-damping metal sheet suitably designed to be used as members required to possess vibration-damping properties as well as heat resistance, weldability and toughness etc., said members being represented by, e.g. foundation metals for and gears in diamond cutters or chip saws used as high speed rotators or structural materials etc. needed to have vibration-damping properties such as working structures in automobiles.
BACKGROUND TECHNIQUES
Materials making use of magnetostriction such as those represented by 12Cr-3Al-Fe, Mn-Cu base alloys and cast iron have been known as vibration-damping materials for a long time. In recent years, sandwich steel sheets having a plastic material between steel plates have been put to practical use.
Of these conventional art vibration-damping materials, the materials making use of magnetostriction such as those represented by 12Cr-3Al-Fe or the Mn-Cu base alloys have had the disadvantages that their vibration-damping properties do not only decrease markedly by plastic working, but drop with increases in temperature. Hence, the critical temperatures for use are 380.degree. C. for the former and 80.degree. C. for the latter. Another problem of such materials has been that their product cost is high. Although cast iron is also a material of which vibration-damping properties have been noted from of old, its vibration-damping properties are not so excellent. The cast iron only produces its vibration-damping properties on its own mass. Albeit inexpensive, the cast iron has the disadvantage that it cannnot be used as the structural material having a limited sectional area, since it is not only poor in plastic workability and weldability but has low strength and is unstable. Referring further to the sandwich steel sheet having a plastic material interposed between steel plates, which is now the most noticeable vibration-damping material in view of its excellent vibration-damping properties and plastic workability, some problems have arisen in that it can only stand up to use at a temperature of as low as 100.degree. C., and is thus not only poor in heat resistance, but is also lacking weldability due to the absence of conductivity, since the platic material is used as the material to attain vibration-damping properties.
Still further, an extremely special vibration-damping material has been proposed, which is obtained by the procedures comprising the steps of subjecting the surface layer of a metal sheet to an intergranular oxidation, a sensitizing or a mechanical treatment to give flaws to the surface thereof, and subjecting the metal sheet having its surface layer thus processed to processing such as cold rolling to introduce intergranular fracture or converting the surface flaws to scab marks, thereby attaining vibration-damping properties. However, the vibration-damping material obtained by such procedures offers some problems in that its plastic workability is poor due to the presence of surface fractures, and its fatigue strength drops markedly so that is reliability as a structural material becomes poor.
DISCLOSURE OF THE SUMMARY OF THE INVENTION
In consequence of studies made to solve the aforesaid problems the conventional art offers, and to develop a vibration-damping sheet suitably used as the member which is required to be plastic workable, heat resistant, weldable and tough, and also to excel in vibration-damping properties, the present inventors have found that a vibration-damping sheet having the desired properties can be obtained by joining together metal plates, while allowing minute inclusions such as iron powders to be present therebetween and bite thereinto, and predetermining the desired range of the joint area of the metal plates to be joined together through the minute inclusions biting thereinto.
More specifically, the present invention is concerned with a vibration-damping metal sheet characterized in that metal plates are joined together through minute inclusions permitted to be substantially u
REFERENCES:
patent: Re22373 (1943-09-01), Benner et al.
patent: 2244771 (1941-06-01), Figour
patent: 2285583 (1942-06-01), Jennings et al.
patent: 2292991 (1942-08-01), Crompton, Jr.
patent: 2490548 (1949-12-01), Schultz
patent: 2627649 (1953-02-01), Matthysse
patent: 3860443 (1975-01-01), Lachman et al.
patent: 4005991 (1977-02-01), Uebayasi et al.
patent: 4154900 (1979-05-01), Kaku et al.
patent: 4565744 (1986-01-01), Walter et al.
patent: 4753850 (1988-06-01), Ibe et al.
Higo Yuichi
Isayama Tomoaki
Iwao Tomoyoshi
Shinoda Ken-ichi
Nisshin Steel Co. Ltd.
Rutledge L. Dewayne
Schumaker David
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